Ithute ka Phello ea Superplasticizer ka Konkreite

1.Superplasticizer ke eng?

Superplasticizer ,ke mofuta oa motsoako oa konkreite o ka fokotsang palo ea metsi a sebelisoang ho kopanya tlas'a boemo ba ho boloka ho putlama ha konkreite ho sa fetohe.Bongata ba bona ke li-anionic surfactants., joalo ka lignin sulfonate, naphthalene sulfonate formaldehyde polymer, etc.Ka mor'a ho eketsa motsoako oa konkreite, e ka qhala likaroloana tsa samente, ntlafatsa ts'ebetso ea eona, fokotsa tšebeliso ea metsi a yuniti le ho ntlafatsa metsi a motsoako oa konkreite.Kapa fokotsa palo ea samente ea yuniti, empa superplasticizer ea konkreite e ngata haholo, eseng feela a ke ke a ntlafatsa motsamao, empa e tla lebisa karohanong ea seretse sa lehlabathe le metsi a tsoang mali.

2.Superplasticizer e sebetsa joang?

Superplasticizer ha e le hantle ke mofuta oa thepa ea moaho, e sebelisoang e tla hlahisa foam le bubble le lipulumo tse ling tsa sol, 'me ba na le litšobotsi tse fapaneng le mokhoa oa ho theha, e bakoa ke ionic superplasticizer.Ka mor'a ho eketsa superplasticizer ho konkreite, superplasticizer e tla ba adsorbed holim'a likaroloana tsa samente. Ka kakaretso, ka 80% ea superplasticizer tla adsorbed ke likaroloana samente, e ka bolokang boemo ba aggregation ntle le ho hasana ka nako e telele.Ntle le superplasticizer ka konkreiti , konkreite e tla ba le moea o itseng (2% kapa joalo), boholo ba dipudula bo bopiloeng ha bo lekane, 'me kabo e sa lekana haholo.Ha superplasticizer e eketsoa ka konkreite, kabo ea likarolo tsa konkreite e ka boloka thepa e ntle le ho ntlafatsa ts'ebetso ea ts'ebetso ea konkreite, joalo ka matla a thata a konkreite.

Holim'a moo, Ho eketsa superplasticizer ka ho kopanya konkreite ho ka thusa ho fokotsa tšebeliso ea metsi ka ho kopanya konkreite, 'me li-bubble tse nyane tsa sol air tse hlahisoang li ka thusa ho tlatsa li-micro pores ka har'a konkreite, haholo ho ntlafatsa ho se mele ha konkreite, le ho matlafatsa lik'hemik'hale tsa eona tsa ho senya lik'hemik'hale le botsofali., e thusang ho kokobetsa khatello ea hydrostatic le ho ntlafatsa bokhoni ba konkreite ho hanela phepelo ea ho qhibiliha ha leqhoa.Setsi se fokotsang metsi se ka liehisa sekhahla sa ho arabela ha hydration ea samente bohareng le morao-rao., ntlafatsa matla a samente le ho ntlafatsa tshebetso ya yona e kgahlanong le katoloso.Ka hona, ha o kopanya konkreite, ntle le ho nahana ka lehlabathe, lejoe, samente le lintho tse ling tse tloaelehileng, tlatsetso e nepahetseng ea sethibelo se itseng sa metsi ho ntlafatsa ts'ebetso ea konkreite.

1. Tšusumetso ea tekanyo ea superplasticizer ka konkreite

(1) Tšusumetso ea moemeli ea fokotsang metsi ho putlama ha konkreite e ncha e tsoakiloeng

Ha ho hlahlojoa ts'ebetso ea konkreite le ho phalla ha metsi, index ea bohlokoa haholo ke ho putlama, boleng bo phahameng, ho ntlafala ha metsi a konkreite.Tahlehelo ea ho thella e bolela phapang lipakeng tsa ho putlama le ho putlama ha qalong ho lekantsoeng ka konkreite kamora nako e itseng.. Lintho tse susumetsang li kenyelletsa samente, likarolo tse akaretsang le karo-karolelano ea samente ea metsi, etc. Mofuta oa sesebelisoa se fokotsang metsi hape ke ntlha e ka sehloohong e susumetsang.

2) Tšusumetso ea se fokotsang metsi holim'a matla a hatellang a konkreite e ncha e tsoakiloeng

Matla a konkreite a entsoeng ke mefuta e sa tšoaneng ea superplasticizer e na le liphello tse fapaneng.Ka ho sebelisa superplasticizer ho ka fokotsa haholo ho kopanya ha konkreite ho kopanya metsi, ntlafatsa tekanyo ea hydration ea samente, ntlafatsa konkreite mongwaha ka mong (3 d, 7 d le 28 d) matla, e ka ba ho tloha ho tse tharo e na le superplasticizer e phahameng ea matla a konkreite e neng e le holimo haholo ho feta matla a konkreite a se nang letho., 3 d, 7 d le 28 d sekhahla sa keketseho ea matla a hatellang se phahame joalo ka 15%, 20% le 30% ka ho latellana.Ho ekelletsa moo, mofuta oa konkreite e nang le matla a phahameng ka ho fetisisa a ho hatella sethaleng sa pele ke konkreite e kopantsoeng le polyhydroxyacid superplasticizer, e nang le matla a phahameng ka ho fetisisa a ho hatella ka mora 28 matsatsi.Leha ho le jwalo, konkreite e entsoeng ka letoto la naphthalene superplasticizer e na le matla a fokolang a batlang a le tlase qalong, e bontshang hore matla a yona a pele a sebetsa a batla a fokola.

3) Tšusumetso ea superplasticizer ts'ebetsong ea pele ea ho phatloha ha konkreite e ncha e tsoakiloeng

'Mele le lik'hemik'hale li ka etsahala pakeng tsa samente le konkreite e nang le metsoako.Mofuta o mong oa superplasticizer o na le ho putlama ho honyenyane ha konkreite e entsoeng ka mofuta o le mong oa samente., ha a ntse a le mofuteng o mong wa samente, tahlehelo ea ho putlama e batlang e le kholo e ka hlaha, kahoo ha ho na superplasticizer e nang le phello e ntle ho mofuta ofe kapa ofe oa samente., index ea tlhahlobo e sebelisoang hangata e kenyelletsa ho putlama le matla a konkreite, empa ho bonolo ho hlokomoloha botsitso ba molumo oa konkreite, ho bonolo ho etsa hore ho fokotsehe hoa pele, e ka potlakisa petso ea konkreite, ama ho tšoarella le polokeho ea mohaho oa mohaho., ntle le lebelo la moya le mocheso o phelang, the types and amount of additives are also the key factors.

4) Influence of superplasticizer on the durability of fresh mixed concrete

Superplasticizer has a greater impact on the durability of concrete, mainly for: (1) the impact of concrete frost resistance.Considering that the smaller the water-cement ratio is, the better the freezing-thawing resistance of concrete will be. By adding water reducing agent with air-entraining effect, the freezing-thawing resistance can be significantly improved.The induced air volume should be controlled at about 2%, and the maximum should not exceed 6%, otherwise it will adversely affect the strength and durability of concrete.Effect of concrete impermeability.Water-cement ratio is the main factor affecting the impermeability of concrete. If its value is greater than 0.55, e tla feta tšebeliso ea metsi a hydration ea samente ho etsa masoba a mangata a tsoang mali ka konkreite le ho eketsa ho kenella ha konkreite.Haeba karolelano ea samente ea metsi e le nyane haholo., e tla ama ts'ebetso ea konkreite, 'me ha e lumellane le ho kenella ha konkreite.(3) khanyetso ea konkreite ho kutu ea tšepe le phello ea ts'ebetso ea carbonization ka khetho ea superplasticizer, e ka fokotsa haholo lebelo la carbonization ea konkreite, thusa ho ntlafatsa ts'ebetso ea carbonization ea konkreite, fokotsa ho senyeha ha tšepe.

Cie-China.org ke mofani ea ka sehloohong oa li-additives tsa konkreite ea foam e fanang ka konkreite e foqohang, superplasticizer,foam konkreite e matlafatsang bakeng sa konkreite e bobebe, Li-block tsa CLC. Haeba u batla superplasticizer, ka kopo ikutloe u lokolohile ho iteanye le rona.